NeuroVox v2.0

NeuroVox v2.0 is built on a custom 220×50mm 4-layer FR4 PCB in a long narrow strip form factor that wraps conformally around the forearm. The board runs four AD8232 EMG front-end ICs across four independent muscle channels, an ESP32-S3 module with native USB support, an ADS1299 8-channel biosignal ADC for high-resolution EMG acquisition, an INA333 instrumentation amplifier, a haptic feedback motor for gesture confirmation, a BNO055 IMU for motion artifact detection and rejection, dry reusable Ag/AgCl electrode contacts integrated directly into the PCB edge fingers eliminating separate lead wires entirely, a MCP73831 LiPo charger, a TPS61023 boost converter, a 5000mAh LiPo battery, a MAX98357A I2S amplifier driving a 3W 4-ohm speaker, RGB status LEDs, and a USB-C port for charging and firmware flashing.